224 



MANUAL OF HISTOLOGY. 



ceous follicles (Tyson's glands) are sometimes difficult to find 

 in the adult. In new^born children, however, these glands are 

 abundant and well developed. The convoluted glands are here 

 absent. 



The extremity of the penis terminates in a cone-shaped 

 body, the glans penis, which has a cavernous structure very 

 similar to that in the body of the organ, and differing only 



in the size of the meshes and 

 the trabeculse, the former being 

 smaller and the latter more deli- 

 cate. The external or mucous 

 surface of the glans is covered 

 with a laminated pavement epi- 

 thelium, the cells of the upper 

 layer being quite flat, those of 



the middle layer ribbed, while in 

 ^ . . , i , 



the lowest l&yer they are colum- 

 nar. There are numerous elastic 

 fibres in the mucous membrane 

 of the glans, and many single 

 or branched papillae are seen, 

 some containing club - shaped 

 nerve-termi nations. 



The system of blood-vessels 

 in connection with the penis con- 

 sists of arteries, veins, capilla- 

 ries, and cavernous spaces. The 



. _^ modes of communication between 



^s^^S*^ir these several vascular structures 

 FIO. m-Transverse section throng the in- are three : a direct passing of the 



jected g)an : a, epithelium of the urethra ; 6, , , , ,, ., 



blood from the larger arterial to 

 the larger venous branches; a 

 somewhat coarse venous reticu- 

 lum communicating with a system of arterioles ; and, finally, 

 a direct capillary anastomosis. 



The lymphatic system of the penis is represented by lymph- 

 spaces, capillaries, and large trunks. The former, the spaces, 

 are oblong in shape, and occur in the loose subcutaneous tissue 

 surrounding the tunica albuginea ; they communicate with a 

 capillary system, which is disposed in longitudinal meshes. 

 The large lymph-trunks formed from these smaller vessels are 



tunica muco*a ; c, corpus cavernosnm urethras ; 

 rf, corpus cavemosum plandis ; e, mucous mem- 

 brane of the glans ; /, epithelium of the glans. 

 Klein. 



